1.0Body Building and Fitness News Bloghttps://www.realmuscleforum.com/contentMarkhttps://www.realmuscleforum.com/content/author/mark/rich600338<blockquote class="wp-embedded-content" data-secret="yZwirzq7xN"><a href="https://www.realmuscleforum.com/content/sustained-abdominal-muscle-hold-ab-crunch/">Sustained abdominal muscle hold, Ab Crunch</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.realmuscleforum.com/content/sustained-abdominal-muscle-hold-ab-crunch/embed/#?secret=yZwirzq7xN" width="600" height="338" title="“Sustained abdominal muscle hold, Ab Crunch” — Body Building and Fitness News Blog" data-secret="yZwirzq7xN" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> https://www.realmuscleforum.com/content/wp-content/uploads/2022/02/abdominals.jpg512512For many people it is the abdominal muscles which are of most concern as they look to tone their stomach and reduce their “belly fat”. There are a number of very simple exercises which will help to burn fat in the abdominal muscle area and tone the abdominal muscles themselves. One basic exercise called the sustained ab muscle hold (or ab crunch) involves lying flat on the floor (preferably using a fitness mat) and lifting your knees 3 to 4